Longest Substring Without Repeating Characters

longest-substring-without-repeating-characters

Merge k Sorted Lists

merge-k-sorted-lists

Reverse Nodes in k-Group

reverse-nodes-in-k-group

Word Break

word-break

Course Schedule II

course-schedule-ii

Serialize and Deserialize Binary Tree

serialize-and-deserialize-binary-tree

Find Winner on a Tic Tac Toe Game

find-winner-on-a-tic-tac-toe-game

3Sum

3sum

Rotate Image

rotate-image

Basic Calculator II

basic-calculator-ii

Move Zeroes

move-zeroes

Top K Frequent Elements

top-k-frequent-elements

Design Tic-Tac-Toe

design-tic-tac-toe

Maximum Number of Balloons

maximum-number-of-balloons

Minimum Time to Make Rope Colorful

minimum-time-to-make-rope-colorful

Dot Product of Two Sparse Vectors

dot-product-of-two-sparse-vectors

Maximal Network Rank

maximal-network-rank

Regular Expression Matching

regular-expression-matching

Container With Most Water

container-with-most-water

Letter Combinations of a Phone Number

letter-combinations-of-a-phone-number

Generate Parentheses

generate-parentheses

Valid Sudoku

valid-sudoku

Trapping Rain Water

trapping-rain-water

Jump Game II

jump-game-ii

Merge Intervals

merge-intervals

Minimum Path Sum

minimum-path-sum

Sort Colors

sort-colors

Valid Palindrome

valid-palindrome

LRU Cache

lru-cache

Number of Islands

number-of-islands

Course Schedule

course-schedule

Valid Anagram

valid-anagram

Insert Delete GetRandom O(1)

insert-delete-getrandom-o1

Subarray Sum Equals K

subarray-sum-equals-k

Design In-Memory File System

design-in-memory-file-system

Spiral Matrix III

spiral-matrix-iii

Largest Perimeter Triangle

largest-perimeter-triangle

Maximum Length of a Concatenated String with Unique Characters

maximum-length-of-a-concatenated-string-with-unique-characters

Find N Unique Integers Sum up to Zero

find-n-unique-integers-sum-up-to-zero

Maximum Value after Insertion

maximum-value-after-insertion

Find Followers Count

find-followers-count

Minimum Changes To Make Alternating Binary String

minimum-changes-to-make-alternating-binary-string

Tesla

#	Title	Difficulty	Frequency
3	Longest Substring Without Repeating Characters	Medium	0.89
23	Merge k Sorted Lists	Hard	4.50
25	Reverse Nodes in k-Group	Hard	5.12
139	Word Break	Medium	1.30
210	Course Schedule II	Medium	2.83
297	Serialize and Deserialize Binary Tree	Hard	4.81
1275	Find Winner on a Tic Tac Toe Game	Easy	6.79